Netlify

Build me a personal static-site deploy pipeline to replace Netlify, running on my own VPS. Requirements: - A small deploy service: Node + Express receiving a GitHub webhook on localhost, with Caddy in front serving the built sites over HTTPS. - On push to main: pull the repo into /srv/sites/<repo>/, run the build command from a per-site config (sites.json: repo, branch, buildCmd, outputDir), and atomically swap a `current` symlink to the new build. - Keep the last 5 builds per site on disk so rollback is `deployctl rollback <site>`, a one-line CLI. - Branch previews: pushes to other branches deploy to <branch>.<site>.mydomain.com via a Caddy wildcard route. - Build logs go to /srv/sites/<repo>/logs/<timestamp>.log; `deployctl status` lists sites, last deploy time, and pass/fail. - Webhook secret and tokens in .env. The service binds to localhost behind Caddy; no accounts, no telemetry. - Out of scope: CDN/edge functions, form handling, and team features. This is one VPS, not a global network. Skip the dashboard UI, the CLI is enough. - README: the Caddy config snippet, GitHub webhook setup, and the wildcard DNS record previews need.